psychoactive: Meaning and Definition of

psy•cho•ac•tive

Pronunciation: (sī"kō-ak'tiv), [key]
— adj.
  1. of or pertaining to a substance having a profound or significant effect on mental processes: a psychoactive drug.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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